<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>用户登录</h1>
    <table>
        <tr>
            <td><label>用户名:</label></td>
            <td><input type="text" id="username"></td>
        </tr>
        <tr>
            <td><label>密码:</label></td>
            <td><input type="password" id="password"></td>
        </tr>
        <tr>
            <td colspan="2">
                <button id="loginBtn">登录</button>
            </td>
        </tr>
    </table>
</body>
</html>